A ballon-like small derigible looking object moved in a straight path, unaffected by wind currents, at a constant speed of about 5 mph

Observer #1 is female, 65 years old, white-caucasian, retired, married to Observer #2, male, 68 years old, white-caucasian, retired lawyer and law school professor, and amateur back-yard astronomer. As the observers were eating dinner at their residence (elevation 650 ft. above sea level; at approximately 33 degree North latitude, 117 degrees West longitude) located at the mouth of a canyon, observer #1 spotted a balloon-like object in the sky about one-half mile due east across a small valley and above a ridge at an elevation of approximately 750 feet above sea level. This is in an neighborhood of widely spaced large homes on large (1 acre+) lots in an uneven terrain. The object moved slowly toward the observers' home until about 1/4 mile away, when it made a right angle turn to the north, at which time observer #2 saw it. The object, which was gray colored, did not behave as a typical balloon. It seemed to have a controlled flight path and a constant speed (perhaps 5 miles per hour), and it maintained a level elevation of about 750 feet. It did not drift in the breeze, nor change elevation, but moved slowly in a straight path. The observers moved outdoors onto the patio behind their residence, and observer #2 observed it thereafter through 7 x 35 binoculars. After making a 90 degree turn to the north, it travelled slowly (estimated at 5 mph) due north across Lake Hodges and toward the City of Escondido, CA, in a straight line until it disappeared in the distance. At one point, over Lake Hodges, the left (western) side of the object glinted in the setting sunlight. The oject had a shape somewhat between that of a balloon and a football. It had no wings, or anything exterior to its basic shape, and no antennae were observed. It was about as large as a standard sized suitcase, about 3 feet long and 1.5 feet wide, and an elyptical shape, somewhat like a small derigible. No sound or light was emitted from the object.